Light-sensitive composition

Abstract

A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the following general formula (d) and 2-[4-(substituted amino)cinnamoyl]naphthalenes represented by the following general formula (e): ##STR1## wherein R and R', which may be the same or different, each represents a methyl group or an ethyl group, and R 0 represents a hydrogen atom, a hydroxy group, a --CR 1 R 2 R 3 group, where R 1 , R 2 and R 3 , which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, or an --OR 4 group, where R 4 represents an alkyl group having 1 to 5 carbon atoms.

What is claimed is: 
     
       1. A light-sensitive composition consisting essentially of at least one ester of an ethylenically unsaturated double bond-containing organic acid and an aliphatic polyhydric alcohol, said ester having a molecular weight of about 1000 or less, and a photopolymerization initiator, said photopolymerization initiator consisting essentially of a combination of the components (1) benzanthrone, a benzanthrone substituted with one or more of halogen atoms, alkyl groups having 1 to 5 carbon atoms or alkoxy groups having 1 to 5 carbon atoms, a 1,2-benzanthraquinone or a benzanthraquinone substituted with one or more of halogen atoms, alkyl groups having 1 to 5 carbon atoms or alkoxy groups having 1 to 5 carbon atoms, or a mixture thereof and   (2) a compound represented by the following general formula (c) ##STR4##  wherein R and R', which may be the same or different, each represents a methyl group or an ethyl group, wherein the weight ratio of component (1) to component (2) of said photopolymerization initiator ranges from about 10:1 to about 1:100 and the amount of said photopolymerization initiator ranges from about 0.1 to about 20% by weight to the weight of the ester.   
     
     
       2. The light-sensitive composition of claim 1, wherein said ester is an oligomer of said ester. 
     
     
       3. The light-sensitive composition of claim 1, wherein said ester is trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolethane triacrylate, trimethylolethane trimethacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, pentaerythritol dimethacrylate, pentaerythritol trimethacrylate, dipentaerythritol diacrylate, dipentaerythritol triacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, dipentearythritol dimethacrylate, dipentaerythritol trimethacrylate, dipentaerythritol tetramethacrylate, ethylene glycol diacrylate, ethylene glycol dimethacrylate, or a mixture thereof. 
     
     
       4. The light-sensitive composition of claim 1, wherein said component (1) of said photopolymerization initiator is benzanthrone, 1-methoxybenzanthrone, 2-methoxybenzanthrone, 3-methoxybenzanthrone, 5-methoxybenzanthrone, 6-ethoxybenzanthrone, 8-ethoxybenzanthrone, 3-methylbenzanthrone, 3-chlorobenzanthrone, 11-chlorobenzanthrone, 3-chloro-2-methoxybenzanthrone, 9-bromo-2-methoxybenzanthrone, 1,2-benzanthraquinone, 6-chloro-1,2-benzanthraquinone, 6-methyl-1,2-benzanthraquinone, or 6-methoxy-1,2-benzanthraquinone, and said component (2) of said photopolymerization initiator is 2-p-(dimethylamino)phenyl-1,3-dioxolane, 2-p-(diethylamino)phenyl-1,3-dioxolane, 2-p-(methylethylamino)phenyl-1,3-dioxolane.